/* * DPMI 0.9 emulation * * Copyright 1995 Alexandre Julliard */ #include #include #include "windef.h" #include "wine/winbase16.h" #include "ldt.h" #include "global.h" #include "module.h" #include "miscemu.h" #include "msdos.h" #include "task.h" #include "thread.h" /* for !MZ_SUPPORTED */ #include "stackframe.h" /* for !MZ_SUPPORTED */ #include "toolhelp.h" #include "selectors.h" #include "process.h" #include "callback.h" #include "debug.h" DEFAULT_DEBUG_CHANNEL(int31) #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive()) void CreateBPB(int drive, BYTE *data, BOOL16 limited); /* defined in int21.c */ static void* lastvalloced = NULL; /* Structure for real-mode callbacks */ typedef struct { DWORD edi; DWORD esi; DWORD ebp; DWORD reserved; DWORD ebx; DWORD edx; DWORD ecx; DWORD eax; WORD fl; WORD es; WORD ds; WORD fs; WORD gs; WORD ip; WORD cs; WORD sp; WORD ss; } REALMODECALL; typedef struct tagRMCB { DWORD address; DWORD proc_ofs,proc_sel; DWORD regs_ofs,regs_sel; struct tagRMCB *next; } RMCB; static RMCB *FirstRMCB = NULL; UINT16 DPMI_wrap_seg; /********************************************************************** * DPMI_xalloc * special virtualalloc, allocates lineary monoton growing memory. * (the usual VirtualAlloc does not satisfy that restriction) */ static LPVOID DPMI_xalloc(int len) { LPVOID ret; LPVOID oldlastv = lastvalloced; if (lastvalloced) { int xflag = 0; ret = NULL; while (!ret) { ret=VirtualAlloc(lastvalloced,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE); if (!ret) lastvalloced = (char *) lastvalloced + 0x10000; /* we failed to allocate one in the first round. * try non-linear */ if (!xflag && (lastvalloced= oldlastv)) xflag++; if ((xflag==2) && (lastvalloced < oldlastv)) { FIXME(int31,"failed to allocate any memory of %d bytes!\n",len); return NULL; } } } else ret=VirtualAlloc(NULL,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE); lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff); return ret; } static void DPMI_xfree(LPVOID ptr) { VirtualFree(ptr,0,MEM_RELEASE); } /* FIXME: perhaps we could grow this mapped area... */ static LPVOID DPMI_xrealloc(LPVOID ptr,int newsize) { MEMORY_BASIC_INFORMATION mbi; LPVOID newptr; newptr = DPMI_xalloc(newsize); if (ptr) { if (!VirtualQuery(ptr,&mbi,sizeof(mbi))) { FIXME(int31,"realloc of DPMI_xallocd region %p?\n",ptr); return NULL; } if (mbi.State == MEM_FREE) { FIXME(int31,"realloc of DPMI_xallocd region %p?\n",ptr); return NULL; } /* We do not shrink allocated memory. most reallocs * only do grows anyway */ if (newsize<=mbi.RegionSize) return ptr; memcpy(newptr,ptr,mbi.RegionSize); DPMI_xfree(ptr); } return newptr; } /********************************************************************** * INT_GetRealModeContext */ static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context ) { EAX_reg(context) = call->eax; EBX_reg(context) = call->ebx; ECX_reg(context) = call->ecx; EDX_reg(context) = call->edx; ESI_reg(context) = call->esi; EDI_reg(context) = call->edi; EBP_reg(context) = call->ebp; EFL_reg(context) = call->fl | V86_FLAG; EIP_reg(context) = call->ip; ESP_reg(context) = call->sp; CS_reg(context) = call->cs; DS_reg(context) = call->ds; ES_reg(context) = call->es; FS_reg(context) = call->fs; GS_reg(context) = call->gs; SS_reg(context) = call->ss; V86BASE(context) = (DWORD) DOSMEM_MemoryBase(0); } /********************************************************************** * INT_SetRealModeContext */ static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context ) { call->eax = EAX_reg(context); call->ebx = EBX_reg(context); call->ecx = ECX_reg(context); call->edx = EDX_reg(context); call->esi = ESI_reg(context); call->edi = EDI_reg(context); call->ebp = EBP_reg(context); call->fl = FL_reg(context); call->ip = IP_reg(context); call->sp = SP_reg(context); call->cs = CS_reg(context); call->ds = DS_reg(context); call->es = ES_reg(context); call->fs = FS_reg(context); call->gs = GS_reg(context); call->ss = SS_reg(context); } /********************************************************************** * DPMI_CallRMCBProc * * This routine does the hard work of calling a callback procedure. */ static void DPMI_CallRMCBProc( CONTEXT *context, RMCB *rmcb, WORD flag ) { if (IS_SELECTOR_SYSTEM( rmcb->proc_sel )) { /* Wine-internal RMCB, call directly */ ((RMCBPROC)rmcb->proc_ofs)(context); } else { #ifdef __i386__ UINT16 ss,es; DWORD edi; INT_SetRealModeContext((REALMODECALL *)PTR_SEG_OFF_TO_LIN( rmcb->regs_sel, rmcb->regs_ofs ), context); ss = SELECTOR_AllocBlock( DOSMEM_MemoryBase(0) + (DWORD)(SS_reg(context)<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE ); FIXME(int31,"untested!\n"); /* The called proc ends with an IRET, and takes these parameters: * DS:ESI = pointer to real-mode SS:SP * ES:EDI = pointer to real-mode call structure * It returns: * ES:EDI = pointer to real-mode call structure (may be a copy) * It is the proc's responsibility to change the return CS:IP in the * real-mode call structure. */ if (flag & 1) { int _clobber; /* 32-bit DPMI client */ __asm__ __volatile__( "pushl %%es\n" "pushl %%ds\n" "pushfl\n" "movl %5,%%es\n" "movl %4,%%ds\n" "lcall %3\n" "popl %%ds\n" "movl %%es,%0\n" "popl %%es\n" : "=g" (es), "=D" (edi), "=S" (_clobber) : "m" (rmcb->proc_ofs), "g" (ss), "g" (rmcb->regs_sel), "S" (ESP_reg(context)), "1" (rmcb->regs_ofs) : "ecx", "edx", "ebp" ); } else { /* 16-bit DPMI client */ CONTEXT ctx = *context; CS_reg(&ctx) = rmcb->proc_sel; EIP_reg(&ctx) = rmcb->proc_ofs; DS_reg(&ctx) = ss; ESI_reg(&ctx) = ESP_reg(context); ES_reg(&ctx) = rmcb->regs_sel; EDI_reg(&ctx) = rmcb->regs_ofs; Callbacks->CallRegisterShortProc(&ctx, 2); es = ES_reg(&ctx); edi = EDI_reg(&ctx); } SELECTOR_FreeBlock(ss, 1); INT_GetRealModeContext((REALMODECALL*)PTR_SEG_OFF_TO_LIN( es, edi ), context); #else ERR(int31,"RMCBs only implemented for i386\n"); #endif } } /********************************************************************** * DPMI_CallRMProc * * This routine does the hard work of calling a real mode procedure. */ int DPMI_CallRMProc( CONTEXT *context, LPWORD stack, int args, int iret ) { LPWORD stack16; #ifndef MZ_SUPPORTED THDB *thdb = THREAD_Current(); WORD sel; SEGPTR seg_addr; #endif /* !MZ_SUPPORTED */ LPVOID addr = NULL; /* avoid gcc warning */ TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() ); NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL; RMCB *CurrRMCB; int alloc = 0, already = 0; BYTE *code; GlobalUnlock16( GetCurrentTask() ); TRACE(int31, "EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", EAX_reg(context), EBX_reg(context), ECX_reg(context), EDX_reg(context) ); TRACE(int31, "ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n", ESI_reg(context), EDI_reg(context), ES_reg(context), DS_reg(context), CS_reg(context), IP_reg(context), args, iret?"IRET":"FAR" ); callrmproc_again: /* there might be some code that just jumps to RMCBs or the like, in which case following the jumps here might get us to a shortcut */ code = CTX_SEG_OFF_TO_LIN(context, CS_reg(context), EIP_reg(context)); switch (*code) { case 0xe9: /* JMP NEAR */ IP_reg(context) += 3 + *(WORD *)(code+1); /* yeah, I know these gotos don't look good... */ goto callrmproc_again; case 0xea: /* JMP FAR */ IP_reg(context) = *(WORD *)(code+1); CS_reg(context) = *(WORD *)(code+3); /* ...but since the label is there anyway... */ goto callrmproc_again; case 0xeb: /* JMP SHORT */ IP_reg(context) += 2 + *(signed char *)(code+1); /* ...because of other gotos below, so... */ goto callrmproc_again; } /* shortcut for chaining to internal interrupt handlers */ if ((CS_reg(context) == 0xF000) && iret) { return INT_RealModeInterrupt( IP_reg(context)/4, context); } /* shortcut for RMCBs */ CurrRMCB = FirstRMCB; while (CurrRMCB && (HIWORD(CurrRMCB->address) != CS_reg(context))) CurrRMCB = CurrRMCB->next; #ifdef MZ_SUPPORTED if (!(CurrRMCB || pModule->lpDosTask)) { FIXME(int31,"DPMI real-mode call using DOS VM task system, not fully tested!\n"); TRACE(int31,"creating VM86 task\n"); if (!MZ_InitTask( MZ_AllocDPMITask( pModule->self ) )) { ERR(int31,"could not setup VM86 task\n"); return 1; } } if (!already) { if (!SS_reg(context)) { alloc = 1; /* allocate default stack */ stack16 = addr = DOSMEM_GetBlock( pModule->self, 64, (UINT16 *)&(SS_reg(context)) ); SP_reg(context) = 64-2; stack16 += 32-1; if (!addr) { ERR(int31,"could not allocate default stack\n"); return 1; } } else { stack16 = CTX_SEG_OFF_TO_LIN(context, SS_reg(context), ESP_reg(context)); } SP_reg(context) -= (args + (iret?1:0)) * sizeof(WORD); #else if (!already) { stack16 = THREAD_STACK16(thdb); #endif stack16 -= args; if (args) memcpy(stack16, stack, args*sizeof(WORD) ); /* push flags if iret */ if (iret) { stack16--; args++; *stack16 = FL_reg(context); } #ifdef MZ_SUPPORTED /* push return address (return to interrupt wrapper) */ *(--stack16) = DPMI_wrap_seg; *(--stack16) = 0; /* adjust stack */ SP_reg(context) -= 2*sizeof(WORD); #endif already = 1; } if (CurrRMCB) { /* RMCB call, invoke protected-mode handler directly */ DPMI_CallRMCBProc(context, CurrRMCB, pModule->lpDosTask?pModule->lpDosTask->dpmi_flag:0); /* check if we returned to where we thought we would */ if ((CS_reg(context) != DPMI_wrap_seg) || (IP_reg(context) != 0)) { /* we need to continue at different address in real-mode space, so we need to set it all up for real mode again */ goto callrmproc_again; } } else { #ifdef MZ_SUPPORTED #if 0 /* this was probably unnecessary */ /* push call address */ *(--stack16) = CS_reg(context); *(--stack16) = IP_reg(context); /* adjust stack */ SP_reg(context) -= 2*sizeof(WORD); /* set initial CS:IP to the wrapper's "lret" */ CS_reg(context) = DPMI_wrap_seg; IP_reg(context) = 2; #endif TRACE(int31,"entering real mode...\n"); DOSVM_Enter( context ); TRACE(int31,"returned from real-mode call\n"); #else addr = CTX_SEG_OFF_TO_LIN(context, CS_reg(context), EIP_reg(context)); sel = SELECTOR_AllocBlock( addr, 0x10000, SEGMENT_CODE, FALSE, FALSE ); seg_addr = PTR_SEG_OFF_TO_SEGPTR( sel, 0 ); CS_reg(context) = HIWORD(seg_addr); IP_reg(context) = LOWORD(seg_addr); EBP_reg(context) = OFFSETOF( thdb->cur_stack ) + (WORD)&((STACK16FRAME*)0)->bp; Callbacks->CallRegisterShortProc(context, args*sizeof(WORD)); SELECTOR_FreeBlock(sel, 1); #endif } if (alloc) DOSMEM_FreeBlock( pModule->self, addr ); return 0; } /********************************************************************** * CallRMInt */ static void CallRMInt( CONTEXT *context ) { CONTEXT realmode_ctx; FARPROC16 rm_int = INT_GetRMHandler( BL_reg(context) ); REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); INT_GetRealModeContext( call, &realmode_ctx ); /* we need to check if a real-mode program has hooked the interrupt */ if (HIWORD(rm_int)!=0xF000) { /* yup, which means we need to switch to real mode... */ CS_reg(&realmode_ctx) = HIWORD(rm_int); EIP_reg(&realmode_ctx) = LOWORD(rm_int); if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE)) SET_CFLAG(context); } else { RESET_CFLAG(context); /* use the IP we have instead of BL_reg, in case some apps decide to move interrupts around for whatever reason... */ if (INT_RealModeInterrupt( LOWORD(rm_int)/4, &realmode_ctx )) SET_CFLAG(context); if (EFL_reg(context)&1) { FIXME(int31,"%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", BL_reg(context), EAX_reg(&realmode_ctx), EBX_reg(&realmode_ctx), ECX_reg(&realmode_ctx), EDX_reg(&realmode_ctx)); FIXME(int31," ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n", ESI_reg(&realmode_ctx), EDI_reg(&realmode_ctx), DS_reg(&realmode_ctx), ES_reg(&realmode_ctx) ); } } INT_SetRealModeContext( call, &realmode_ctx ); } static void CallRMProc( CONTEXT *context, int iret ) { REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); CONTEXT context16; TRACE(int31, "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx); TRACE(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" ); if (!(p->cs) && !(p->ip)) { /* remove this check if Int21/6501 case map function has been implemented */ SET_CFLAG(context); return; } INT_GetRealModeContext(p, &context16); DPMI_CallRMProc( &context16, ((LPWORD)PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context)))+3, CX_reg(context), iret ); INT_SetRealModeContext(p, &context16); } static void WINAPI WINE_UNUSED RMCallbackProc( RMCB *rmcb ) { /* This routine should call DPMI_CallRMCBProc, but we don't have the register structure available - this is easily fixed by going through a Win16 register relay instead of calling RMCallbackProc "directly", but I won't bother at this time. */ FIXME(int31,"not properly supported on your architecture!\n"); } static RMCB *DPMI_AllocRMCB( void ) { RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB)); UINT16 uParagraph; if (NewRMCB) { #ifdef MZ_SUPPORTED LPVOID RMCBmem = DOSMEM_GetBlock(0, 4, &uParagraph); LPBYTE p = RMCBmem; *p++ = 0xcd; /* RMCB: */ *p++ = 0x31; /* int $0x31 */ /* it is the called procedure's task to change the return CS:EIP the DPMI 0.9 spec states that if it doesn't, it will be called again */ *p++ = 0xeb; *p++ = 0xfc; /* jmp RMCB */ #else LPVOID RMCBmem = DOSMEM_GetBlock(0, 15, &uParagraph); LPBYTE p = RMCBmem; *p++ = 0x68; /* pushl */ *(LPVOID *)p = NewRMCB; p+=4; *p++ = 0x9a; /* lcall */ *(FARPROC16 *)p = (FARPROC16)RMCallbackProc; /* FIXME: register relay */ p+=4; GET_CS(*(WORD *)p); p+=2; *p++=0xc3; /* lret (FIXME?) */ #endif NewRMCB->address = MAKELONG(0, uParagraph); NewRMCB->next = FirstRMCB; FirstRMCB = NewRMCB; } return NewRMCB; } static void AllocRMCB( CONTEXT *context ) { RMCB *NewRMCB = DPMI_AllocRMCB(); TRACE(int31, "Function to call: %04x:%04x\n", (WORD)DS_reg(context), SI_reg(context) ); if (NewRMCB) { /* FIXME: if 32-bit DPMI client, use ESI and EDI */ NewRMCB->proc_ofs = SI_reg(context); NewRMCB->proc_sel = DS_reg(context); NewRMCB->regs_ofs = DI_reg(context); NewRMCB->regs_sel = ES_reg(context); CX_reg(context) = HIWORD(NewRMCB->address); DX_reg(context) = LOWORD(NewRMCB->address); } else { AX_reg(context) = 0x8015; /* callback unavailable */ SET_CFLAG(context); } } FARPROC16 WINAPI DPMI_AllocInternalRMCB( RMCBPROC proc ) { RMCB *NewRMCB = DPMI_AllocRMCB(); if (NewRMCB) { NewRMCB->proc_ofs = (DWORD)proc; NewRMCB->proc_sel = 0; NewRMCB->regs_ofs = 0; NewRMCB->regs_sel = 0; return (FARPROC16)(NewRMCB->address); } return NULL; } static int DPMI_FreeRMCB( DWORD address ) { RMCB *CurrRMCB = FirstRMCB; RMCB *PrevRMCB = NULL; while (CurrRMCB && (CurrRMCB->address != address)) { PrevRMCB = CurrRMCB; CurrRMCB = CurrRMCB->next; } if (CurrRMCB) { if (PrevRMCB) PrevRMCB->next = CurrRMCB->next; else FirstRMCB = CurrRMCB->next; DOSMEM_FreeBlock(0, DOSMEM_MapRealToLinear(CurrRMCB->address)); HeapFree(GetProcessHeap(), 0, CurrRMCB); return 0; } return 1; } static void FreeRMCB( CONTEXT *context ) { FIXME(int31, "callback address: %04x:%04x\n", CX_reg(context), DX_reg(context)); if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) { AX_reg(context) = 0x8024; /* invalid callback address */ SET_CFLAG(context); } } void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc ) { DPMI_FreeRMCB( (DWORD)proc ); } #ifdef MZ_SUPPORTED /* (see loader/dos/module.c, function MZ_InitDPMI) */ static void StartPM( CONTEXT *context, LPDOSTASK lpDosTask ) { char *base = DOSMEM_MemoryBase(0); UINT16 cs, ss, ds, es; CONTEXT pm_ctx; DWORD psp_ofs = (DWORD)(lpDosTask->psp_seg<<4); PDB16 *psp = (PDB16 *)(base + psp_ofs); HANDLE16 env_seg = psp->environment; int is32; RESET_CFLAG(context); lpDosTask->dpmi_flag = AX_reg(context); is32 = lpDosTask->dpmi_flag & 1; /* our mode switch wrapper have placed the desired CS into DX */ cs = SELECTOR_AllocBlock( base + (DWORD)(DX_reg(context)<<4), 0x10000, SEGMENT_CODE, FALSE, FALSE ); /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing 32-bit code using this stack. */ ss = SELECTOR_AllocBlock( base + (DWORD)(SS_reg(context)<<4), 0x10000, SEGMENT_DATA, is32, FALSE ); /* do the same for the data segments, just in case */ if (DS_reg(context) == SS_reg(context)) ds = ss; else ds = SELECTOR_AllocBlock( base + (DWORD)(DS_reg(context)<<4), 0x10000, SEGMENT_DATA, is32, FALSE ); es = SELECTOR_AllocBlock( base + psp_ofs, 0x100, SEGMENT_DATA, is32, FALSE ); /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */ psp->environment = SELECTOR_AllocBlock( base + (DWORD)(env_seg<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE ); pm_ctx = *context; CS_reg(&pm_ctx) = lpDosTask->dpmi_sel; /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */ AX_reg(&pm_ctx) = ss; DX_reg(&pm_ctx) = cs; DS_reg(&pm_ctx) = ds; ES_reg(&pm_ctx) = es; FS_reg(&pm_ctx) = 0; GS_reg(&pm_ctx) = 0; TRACE(int31,"DOS program is now entering protected mode\n"); Callbacks->CallRegisterShortProc(&pm_ctx, 0); /* in the current state of affairs, we won't ever actually return here... */ /* we should have int21/ah=4c do it someday, though... */ SELECTOR_FreeBlock(psp->environment, 1); psp->environment = env_seg; SELECTOR_FreeBlock(es, 1); if (ds != ss) SELECTOR_FreeBlock(ds, 1); SELECTOR_FreeBlock(ss, 1); SELECTOR_FreeBlock(cs, 1); } /* DPMI Raw Mode Switch handler */ void WINAPI DPMI_RawModeSwitch( SIGCONTEXT *context ) { LPDOSTASK lpDosTask = MZ_Current(); CONTEXT rm_ctx; int ret; if (!lpDosTask) { /* we could probably start a DPMI-only dosmod task here, but I doubt anything other than real DOS apps want to call raw mode switch */ ERR(int31,"attempting raw mode switch without DOS task!\n"); ExitProcess(1); } /* initialize real-mode context as per spec */ memset(&rm_ctx, 0, sizeof(rm_ctx)); DS_reg(&rm_ctx) = AX_sig(context); ES_reg(&rm_ctx) = CX_sig(context); SS_reg(&rm_ctx) = DX_sig(context); ESP_reg(&rm_ctx) = EBX_sig(context); CS_reg(&rm_ctx) = SI_sig(context); EIP_reg(&rm_ctx) = EDI_sig(context); EBP_reg(&rm_ctx) = EBP_sig(context); FS_reg(&rm_ctx) = 0; GS_reg(&rm_ctx) = 0; EFL_reg(&rm_ctx) = EFL_sig(context); /* at least we need the IF flag */ /* enter real mode again */ TRACE(int31,"re-entering real mode at %04lx:%04lx\n", CS_reg(&rm_ctx),EIP_reg(&rm_ctx)); ret = DOSVM_Enter( &rm_ctx ); /* when the real-mode stuff call its mode switch address, DOSVM_Enter will return and we will continue here */ if (ret<0) { /* if the sync was lost, there's no way to recover */ ExitProcess(1); } /* alter protected-mode context as per spec */ DS_sig(context) = AX_reg(&rm_ctx); ES_sig(context) = CX_reg(&rm_ctx); SS_sig(context) = DX_reg(&rm_ctx); ESP_sig(context) = EBX_reg(&rm_ctx); CS_sig(context) = SI_reg(&rm_ctx); EIP_sig(context) = EDI_reg(&rm_ctx); EBP_sig(context) = EBP_reg(&rm_ctx); FS_sig(context) = 0; GS_sig(context) = 0; /* Return to new address and hope that we didn't mess up */ TRACE(int31,"re-entering protected mode at %04x:%08lx\n", CS_sig(context), EIP_sig(context)); } #else void WINAPI DPMI_RawModeSwitch( SIGCONTEXT *context ) { ERR(int31,"don't even think about DPMI raw mode switch without DOS support!\n"); ExitProcess(1); } #endif #define DOS_APP_ISDOS(addr,base) ((addr) < 0x110000) #define DOS_WINE_ISDOS(addr,base) (((addr) >= (base)) && ((addr) < (base) + 0x110000)) #define DOS_UC_APPTOWINE(addr,base) ((addr) + (base)) #define DOS_UC_WINETOAPP(addr,base) ((addr) - (base)) #define DOS_APPTOWINE(addr,base) (DOS_APP_ISDOS(addr,base) ? DOS_UC_APPTOWINE(addr,base) : (addr)) #define DOS_WINETOAPP(addr,base) (DOS_WINE_ISDOS(addr,base) ? DOS_UC_WINETOAPP(addr,base) : (addr)) #define DOS_BADLIMIT(addr,base,limit) \ ((limit == 0xffffffff) || /* disallow "fat DS" for now */ \ (DOS_WINE_ISDOS(addr,base) && \ ((addr) + (limit) > (base) + 0x110000))) /********************************************************************** * INT_Int31Handler * * Handler for int 31h (DPMI). */ void WINAPI INT_Int31Handler( CONTEXT *context ) { /* * Note: For Win32s processes, the whole linear address space is * shifted by 0x10000 relative to the OS linear address space. * See the comment in msdos/vxd.c. */ DWORD offset = W32S_APPLICATION() ? W32S_OFFSET : 0; DWORD dw; BYTE *ptr; LPDOSTASK lpDosTask = MZ_Current(); #ifdef MZ_SUPPORTED if (ISV86(context) && lpDosTask) { /* Called from real mode, check if it's our wrapper */ TRACE(int31,"called from real mode\n"); if (CS_reg(context)==lpDosTask->dpmi_seg) { /* This is the protected mode switch */ StartPM(context,lpDosTask); return; } else if (CS_reg(context)==lpDosTask->xms_seg) { /* This is the XMS driver entry point */ XMS_Handler(context); return; } else { /* Check for RMCB */ RMCB *CurrRMCB = FirstRMCB; while (CurrRMCB && (HIWORD(CurrRMCB->address) != CS_reg(context))) CurrRMCB = CurrRMCB->next; if (CurrRMCB) { /* RMCB call, propagate to protected-mode handler */ DPMI_CallRMCBProc(context, CurrRMCB, lpDosTask->dpmi_flag); return; } } } #endif RESET_CFLAG(context); switch(AX_reg(context)) { case 0x0000: /* Allocate LDT descriptors */ TRACE(int31,"allocate LDT descriptors (%d)\n",CX_reg(context)); if (!(AX_reg(context) = AllocSelectorArray16( CX_reg(context) ))) { TRACE(int31,"failed\n"); AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); } TRACE(int31,"success, array starts at 0x%04x\n",AX_reg(context)); break; case 0x0001: /* Free LDT descriptor */ TRACE(int31,"free LDT descriptor (0x%04x)\n",BX_reg(context)); if (FreeSelector16( BX_reg(context) )) { AX_reg(context) = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { /* If a segment register contains the selector being freed, */ /* set it to zero. */ if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0; if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0; if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0; if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0; } break; case 0x0002: /* Real mode segment to descriptor */ TRACE(int31,"real mode segment to descriptor (0x%04x)\n",BX_reg(context)); { WORD entryPoint = 0; /* KERNEL entry point for descriptor */ switch(BX_reg(context)) { case 0x0000: entryPoint = 183; break; /* __0000H */ case 0x0040: entryPoint = 193; break; /* __0040H */ case 0xa000: entryPoint = 174; break; /* __A000H */ case 0xb000: entryPoint = 181; break; /* __B000H */ case 0xb800: entryPoint = 182; break; /* __B800H */ case 0xc000: entryPoint = 195; break; /* __C000H */ case 0xd000: entryPoint = 179; break; /* __D000H */ case 0xe000: entryPoint = 190; break; /* __E000H */ case 0xf000: entryPoint = 194; break; /* __F000H */ default: AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context)); break; } if (entryPoint) AX_reg(context) = LOWORD(NE_GetEntryPoint( GetModuleHandle16( "KERNEL" ), entryPoint )); } break; case 0x0003: /* Get next selector increment */ TRACE(int31,"get selector increment (__AHINCR)\n"); AX_reg(context) = __AHINCR; break; case 0x0004: /* Lock selector (not supported) */ FIXME(int31,"lock selector not supported\n"); AX_reg(context) = 0; /* FIXME: is this a correct return value? */ break; case 0x0005: /* Unlock selector (not supported) */ FIXME(int31,"unlock selector not supported\n"); AX_reg(context) = 0; /* FIXME: is this a correct return value? */ break; case 0x0006: /* Get selector base address */ TRACE(int31,"get selector base address (0x%04x)\n",BX_reg(context)); if (!(dw = GetSelectorBase( BX_reg(context) ))) { AX_reg(context) = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { #ifdef MZ_SUPPORTED if (lpDosTask) { DWORD base = (DWORD)DOSMEM_MemoryBase(lpDosTask->hModule); dw = DOS_WINETOAPP(dw, base); } #endif CX_reg(context) = HIWORD(W32S_WINE2APP(dw, offset)); DX_reg(context) = LOWORD(W32S_WINE2APP(dw, offset)); } break; case 0x0007: /* Set selector base address */ TRACE(int31, "set selector base address (0x%04x,0x%08lx)\n", BX_reg(context), W32S_APP2WINE(MAKELONG(DX_reg(context),CX_reg(context)), offset)); dw = W32S_APP2WINE(MAKELONG(DX_reg(context), CX_reg(context)), offset); #ifdef MZ_SUPPORTED if (lpDosTask) { DWORD base = (DWORD)DOSMEM_MemoryBase(lpDosTask->hModule); dw = DOS_APPTOWINE(dw, base); } #endif SetSelectorBase(BX_reg(context), dw); break; case 0x0008: /* Set selector limit */ TRACE(int31,"set selector limit (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context))); dw = MAKELONG( DX_reg(context), CX_reg(context) ); #ifdef MZ_SUPPORTED if (lpDosTask) { DWORD base = (DWORD)DOSMEM_MemoryBase(lpDosTask->hModule); DWORD sbase = GetSelectorBase( BX_reg(context) ); if (!sbase) { /* the app has set the limit without setting the base, * it must be relying on that the default should be DOS space; * so set the base address now */ SetSelectorBase( BX_reg(context), sbase = base ); if (dw == 0xffffffff) { /* djgpp does this without checking (in _dos_ds setup, crt1.c), * so we have to override the limit here */ dw = 0x110000; } } if (DOS_BADLIMIT(sbase, base, dw)) { AX_reg(context) = 0x8021; /* invalid value */ SET_CFLAG(context); break; } } #endif SetSelectorLimit16( BX_reg(context), dw ); break; case 0x0009: /* Set selector access rights */ TRACE(int31,"set selector access rights(0x%04x,0x%04x)\n",BX_reg(context),CX_reg(context)); SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) ); break; case 0x000a: /* Allocate selector alias */ TRACE(int31,"allocate selector alias (0x%04x)\n",BX_reg(context)); if (!(AX_reg(context) = AllocCStoDSAlias16( BX_reg(context) ))) { AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); } break; case 0x000b: /* Get descriptor */ TRACE(int31,"get descriptor (0x%04x)\n",BX_reg(context)); { ldt_entry entry; LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry ); #ifdef MZ_SUPPORTED if (lpDosTask) { DWORD base = (DWORD)DOSMEM_MemoryBase(lpDosTask->hModule); entry.base = DOS_WINETOAPP(entry.base, base); } #endif entry.base = W32S_WINE2APP(entry.base, offset); /* FIXME: should use ES:EDI for 32-bit clients */ LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ), &entry ); } break; case 0x000c: /* Set descriptor */ TRACE(int31,"set descriptor (0x%04x)\n",BX_reg(context)); { ldt_entry entry; LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ), &entry ); entry.base = W32S_APP2WINE(entry.base, offset); #ifdef MZ_SUPPORTED if (lpDosTask) { DWORD base = (DWORD)DOSMEM_MemoryBase(lpDosTask->hModule); entry.base = DOS_APPTOWINE(entry.base, base); if (DOS_BADLIMIT(entry.base, base, entry.limit)) { AX_reg(context) = 0x8021; /* invalid value */ SET_CFLAG(context); break; } } #endif LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry ); } break; case 0x000d: /* Allocate specific LDT descriptor */ FIXME(int31,"allocate descriptor (0x%04x), stub!\n",BX_reg(context)); AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); break; case 0x0100: /* Allocate DOS memory block */ TRACE(int31,"allocate DOS memory block (0x%x paragraphs)\n",BX_reg(context)); dw = GlobalDOSAlloc16((DWORD)BX_reg(context)<<4); if (dw) { AX_reg(context) = HIWORD(dw); DX_reg(context) = LOWORD(dw); } else { AX_reg(context) = 0x0008; /* insufficient memory */ BX_reg(context) = DOSMEM_Available(0)>>4; SET_CFLAG(context); } break; case 0x0101: /* Free DOS memory block */ TRACE(int31,"free DOS memory block (0x%04x)\n",DX_reg(context)); dw = GlobalDOSFree16(DX_reg(context)); if (!dw) { AX_reg(context) = 0x0009; /* memory block address invalid */ SET_CFLAG(context); } break; case 0x0200: /* get real mode interrupt vector */ FIXME(int31,"get realmode interupt vector(0x%02x) unimplemented.\n", BL_reg(context)); SET_CFLAG(context); break; case 0x0201: /* set real mode interrupt vector */ FIXME(int31, "set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context),CX_reg(context),DX_reg(context)); SET_CFLAG(context); break; case 0x0204: /* Get protected mode interrupt vector */ TRACE(int31,"get protected mode interrupt handler (0x%02x), stub!\n",BL_reg(context)); dw = (DWORD)INT_GetPMHandler( BL_reg(context) ); CX_reg(context) = HIWORD(dw); DX_reg(context) = LOWORD(dw); break; case 0x0205: /* Set protected mode interrupt vector */ TRACE(int31,"set protected mode interrupt handler (0x%02x,%p), stub!\n", BL_reg(context),PTR_SEG_OFF_TO_LIN(CX_reg(context),DX_reg(context))); INT_SetPMHandler( BL_reg(context), (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context), DX_reg(context) )); break; case 0x0300: /* Simulate real mode interrupt */ CallRMInt( context ); break; case 0x0301: /* Call real mode procedure with far return */ CallRMProc( context, FALSE ); break; case 0x0302: /* Call real mode procedure with interrupt return */ CallRMProc( context, TRUE ); break; case 0x0303: /* Allocate Real Mode Callback Address */ AllocRMCB( context ); break; case 0x0304: /* Free Real Mode Callback Address */ FreeRMCB( context ); break; case 0x0305: /* Get State Save/Restore Addresses */ TRACE(int31,"get state save/restore addresses\n"); /* we probably won't need this kind of state saving */ AX_reg(context) = 0; /* real mode: just point to the lret */ BX_reg(context) = DPMI_wrap_seg; ECX_reg(context) = 2; /* protected mode: don't have any handler yet... */ FIXME(int31,"no protected-mode dummy state save/restore handler yet\n"); SI_reg(context) = 0; EDI_reg(context) = 0; break; case 0x0306: /* Get Raw Mode Switch Addresses */ TRACE(int31,"get raw mode switch addresses\n"); if (lpDosTask) { /* real mode, point to standard DPMI return wrapper */ BX_reg(context) = DPMI_wrap_seg; ECX_reg(context) = 0; /* protected mode, point to DPMI call wrapper */ SI_reg(context) = lpDosTask->dpmi_sel; EDI_reg(context) = 8; /* offset of the INT 0x31 call */ } else { ERR(int31,"win app attempting to get raw mode switch!\n"); AX_reg(context) = 0x8001; /* unsupported function */ SET_CFLAG(context); } break; case 0x0400: /* Get DPMI version */ TRACE(int31,"get DPMI version\n"); { SYSTEM_INFO si; GetSystemInfo(&si); AX_reg(context) = 0x005a; /* DPMI version 0.90 */ BX_reg(context) = 0x0005; /* Flags: 32-bit, virtual memory */ CL_reg(context) = si.wProcessorLevel; DX_reg(context) = 0x0102; /* Master/slave interrupt controller base*/ break; } case 0x0500: /* Get free memory information */ TRACE(int31,"get free memory information\n"); { MEMMANINFO mmi; mmi.dwSize = sizeof(mmi); MemManInfo16(&mmi); ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context)); /* the layout is just the same as MEMMANINFO, but without * the dwSize entry. */ memcpy(ptr,((char*)&mmi)+4,sizeof(mmi)-4); break; } case 0x0501: /* Allocate memory block */ TRACE(int31,"allocate memory block (%ld)\n",MAKELONG(CX_reg(context),BX_reg(context))); if (!(ptr = (BYTE *)DPMI_xalloc(MAKELONG(CX_reg(context), BX_reg(context))))) { AX_reg(context) = 0x8012; /* linear memory not available */ SET_CFLAG(context); } else { BX_reg(context) = SI_reg(context) = HIWORD(W32S_WINE2APP(ptr, offset)); CX_reg(context) = DI_reg(context) = LOWORD(W32S_WINE2APP(ptr, offset)); } break; case 0x0502: /* Free memory block */ TRACE(int31, "free memory block (0x%08lx)\n", W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)), offset)); DPMI_xfree( (void *)W32S_APP2WINE(MAKELONG(DI_reg(context), SI_reg(context)), offset) ); break; case 0x0503: /* Resize memory block */ TRACE(int31, "resize memory block (0x%08lx,%ld)\n", W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)), offset), MAKELONG(CX_reg(context),BX_reg(context))); if (!(ptr = (BYTE *)DPMI_xrealloc( (void *)W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)), offset), MAKELONG(CX_reg(context),BX_reg(context))))) { AX_reg(context) = 0x8012; /* linear memory not available */ SET_CFLAG(context); } else { BX_reg(context) = SI_reg(context) = HIWORD(W32S_WINE2APP(ptr, offset)); CX_reg(context) = DI_reg(context) = LOWORD(W32S_WINE2APP(ptr, offset)); } break; case 0x0507: /* Modify page attributes */ FIXME(int31,"modify page attributes unimplemented\n"); break; /* Just ignore it */ case 0x0600: /* Lock linear region */ FIXME(int31,"lock linear region unimplemented\n"); break; /* Just ignore it */ case 0x0601: /* Unlock linear region */ FIXME(int31,"unlock linear region unimplemented\n"); break; /* Just ignore it */ case 0x0602: /* Unlock real-mode region */ FIXME(int31,"unlock realmode region unimplemented\n"); break; /* Just ignore it */ case 0x0603: /* Lock real-mode region */ FIXME(int31,"lock realmode region unimplemented\n"); break; /* Just ignore it */ case 0x0604: /* Get page size */ TRACE(int31,"get pagesize\n"); BX_reg(context) = 0; CX_reg(context) = VIRTUAL_GetPageSize(); break; case 0x0702: /* Mark page as demand-paging candidate */ FIXME(int31,"mark page as demand-paging candidate\n"); break; /* Just ignore it */ case 0x0703: /* Discard page contents */ FIXME(int31,"discard page contents\n"); break; /* Just ignore it */ case 0x0800: /* Physical address mapping */ FIXME(int31,"map real to linear (0x%08lx)\n",MAKELONG(CX_reg(context),BX_reg(context))); if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context))))) { AX_reg(context) = 0x8021; SET_CFLAG(context); } else { BX_reg(context) = HIWORD(W32S_WINE2APP(ptr, offset)); CX_reg(context) = LOWORD(W32S_WINE2APP(ptr, offset)); RESET_CFLAG(context); } break; default: INT_BARF( context, 0x31 ); AX_reg(context) = 0x8001; /* unsupported function */ SET_CFLAG(context); break; } }